Problem with Query_posts and filtering

I’m trying to exclude some categories and tags from my front page. I used this code to accomplish it:

<?php
$args= array(
‘category__not_in’ => array(443, 947, 701),
‘showposts’=>8,
‘tag__not_in’ => array(’21’),
);
query_posts($args);
while (have_posts()) : the_post(); ?>

However, when I surf to an older page (ie http://www.tvovermind.com/page/6) I’m getting the same entries on each page. Where am I going wrong?